Extrusion & Post
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LDPE Blown Film Temperature
Problem Phenomenon
In LDPE blown film, the bubble is unstable and transparency is poor.
Cause Analysis
Melt temperature fluctuation changes viscosity, affecting bubble stability and optical properties; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; This mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting.
Solution
Blown film temperature stably controlled at 170-210℃; uniform die temperature; temperature control inspection; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Stable blown film temperature is the prerequisite for bubble quality; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; Incorporate this case into the defect archive as a troubleshooting reference for similar future problems.
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